Paper feeding device



l. A. HAGERSTROM.

PAPER FEEDING DEVICE. APPucATlon FILED Nov. l. 19u.

1 ,31 1 ,688. Patented July 29, 1919.

2 SHEETS-SHEET l.

@EMMA PLANBBRAPH C0. WASHINC'NIM. Dg d.

l. A. HAGERSTROM. PAPER ssamm; nsvlce. APPLICATION FILED NOV. I 19H'.

Patented July 29,1919.

' ing members and means for moving the same forward or away from the platen at'will. Theapron and UNITED sTATEs HPATENT oEEioE.

JOHN A. HaGEEsTEoi/r, or scnANToN, PENNSYLVANIA, AssieNoE To vIoToE TYPE- WEITEE COMPANY, 0E scEANToN, PENNSYLVANIA, A coEPonATioN or NEW Yomc PAPER-FEEDING DEVICE.

Speeication of Letters Patent.

Patented July 29, 1919.

To all whom it may concern: v

Be it known thatl, J oHN HAGERSTROM, a citizen of the United States, residing in Scranton, county of Lackawanna, State of Pennsylvania, have invented new and useful Improvements in Paper-Feeding Devices, of which the following is a specification.

My invention relates to typewriting machines or the like and particularly to those devices which coperate with the rotatable platen to secure a smooth and accurate feeding of the work sheet through the machine.

The primary object of my invention is to provide a device which will function eiiiciently and which may be silnply and econ nomically constructed and assembled.

ln the .accompanying drawing, I have shown by way of illustration, an embodiment of my invention as applied to the Victor typewriting machine. It Will be observed, however, that the invention. is apn plicable to any typewriting or similar machine and is capable of modification in re- -Spect to details within the scope of the claims.

In the drawings,

Figure l is a bottom view of the Victor typewriting carriage containing my improvement, numerous parts which ordinarily accompany such a carriage being omitted.

Fig. 2 is a front elevation of the saine.

Fig. 3 is a transverse sectional view on the line III-III of Fig.f1.

Fig. 4-is a longitudinal sectional view on thev line VIVIV of Fig. 1. l

Figs. 5 and 6 are bottom views of feed roll supporting members. f

Fig.` 7 is an end elevation. f

Referring more particularly to thedrawings, the carriage consists of a .Channel bar 1, having a bearing roller 2 and end plates 3, 4. Between the end plates,Y platen 5 is rotatably mounted on shaft 6, .which is journaled inithe' end plates 3, 4. Scale bar 7 is of usual construction andA need. not be further referred to.

Comn-g now tothe improvements covered by the present invention, these consist mainly ina plurality of pairs of Vfeed rolls 8, a paper apron 9, together with supportfor .the said-rolls and apron feed rolls are located underneath the platen and are intended to hold a work sheet or work sheets against the platen at this point. The feed rolls are positioned in two longitn dinal rows of openings 10 which are like- -wise paired in a. transverse direction. The work :sheets will thus be supported by a front and rear series of feed rolls and, be-y tween the feed rolls, by the continuous paper apron 9. Nearly all of the parts which go to make up my invention, includingr the apron 9, may be formed from sheet metal, thus insuring economy of material and labor and the utmost lightness consistent with Strength. As shown, the apron 9'has a se ries of notches 11, out into its front edge for the purpose of increasing the iexibility of the apron. The front and rear edges of the apron and of the openings 10 are turned up slightly to prevent them from catching the Work sheet as it passes through the machine iny either direction. Each pair of feed rolls 8 has pintle's 1Q, by means of which the feed rolls arejournaled in the ends of forwardly and rearwardly projecting -arms 13, 14 of cradle'sl. The apron 9 is also supported by cradles 15 through leaf springs 16, which are flexed so as to bear upwardly against the apron at their middle portions. The springs have reduced end portions 16 thus forming shoulders which abut against. lugs or projections 16h on the arms 13 (see Figs. 1, 3 and 4). The strength of the springs 1 6'is adjusted so as to press the apron V9 lightly, against the worksheets, but notas strongly as the `feed rol-ls are pressed by the springs 1-7 hereinafter described. A number of hooks 18 preferably integral' with apron 9, engage arms 13,114 so that the feed roll and .apron can be simultaneously witl fc5 pins.l 40 which have their outer ends pro-l jecting slightly through elongated perforations or.l slots 41 in cradles 15. The extreme right and left-pins 4() are so positioned as to bear freely against the outer ends of their respectiveslotsf41, thus preventing longitushown by Figs. 4

dinal displacement of the apron in either direction. The intermediate pins l0 mayV be positioned an Where in thelr respective' slots preferably iil'ermediate of the ends thereof. All the pins are effective in reventing transverse or rotary movement o? the vapron wih the platen wlhie at the same time pernii ting al radiale" justment with respect thereto.

It has been found that better feeding results where the back feed rolls press more strongly against the platen than do the front feed rolls. This e'ect is obtained in the construction described by making the forwardly projecting arms 13 longer than the rearwardly projecting arms 14. Consequently, the Vpressure delivered to die arms by the cradles 15 will be unevenl-y divided between the front and back pairs of arms, the back pairs 14 receiving the major portion of the pressure and thus making more pronounced the dis arity between the pliessure delivered by Sie front feed rolls and the back feed rolls. Each cradle 15 has a pair of holes 19 through which project the reduced portions 20 of arms 21. The cradles are thus capable of a limited rocking motion on a longitudinal axis, so that the pressure with respect to the forward andv rear feed rolls of each pair will be eqnalize'd. The arms 21 extend forwardly and upwardly fromyokes or rockers22, and project through openings 23 in channel bar 1. Said yokes or rockers are provided with rearwardly extending in perforations 25 of channel ibar l. As and 5, -i'nlenbersA 22 are capable of a Vrocking movement on the' lugs, 24 as pivots and this movement is imparted to cradles 15, -feed rolls 8= and paper apron 9. A series of springs 17 'bear at their free ends against the underside of members 22, thus tending to-hold the feed rolls against the platen. The Jfii'red ends of! the springs 17 have lateraliextensions Q6 which are held against upward displace-l mentby engaging respectively fa pair of extensions@ wallie -r'esupported in' a mam, ner new tdbe explainedg Foreaeh spring rz. demise block esti a width-smh al; to causait to seat snugly )irl channel' liar 1. At its four corneredhe lblock has ears 99 struclr u at rihtalnfgles to Ethe bloclrfand having reade peoraftiens. Screws 30 project laarally th'mnfghchanne bar 1 and into the threaded penforeliicns of ears f 29. The` extensions 27 heretofore referred to, are preferably formed 4.as an inte'ggfraly 'part of the right or left pair et ears 29, depending the direction' in which the correspon ing spring` 17V is presented. An adjustment screw llinving threaded engagement with block 28l projects into the channel-or bar 1 and has on its inner end the bearing pleite 32. This plate provides a seat or hump 33 lugs '24 loosely seated tending toI pressi` said formed in spring 17. It will be obvious that by advancing or retreating screw 31, the tflSlO'lf f sV ring 17 may be respectively increased or essened. A pair of peripheral lugs 34, on plates 32 ride over hump 33 as the screw turns and thus coact with thc hump as a locking device to maintain the ad'ustment.

he means for depressing members 22 against springs 17 comprisesl a cam rod 35 which extends substantially the entire length of the channel bar 1, and has at one end means for rocking it, comprising an arm 3G. This arm has pin and slot connection with the rocking lever 37 pivoted to end plate 4 as by screw 88, and having a linger seat 39. Cam rod 35 may be of any desired non-circular cross section, but' is preferably. D- shaped 4or semi-cylindrical as shown. When the device is in the paper gripping position, as in Fig. 3, the Het side of rod 35 will bea r against channel bar 31, while its curved portion will be partially embraced by the transversely concave upper surface of members 22. When the upper end of lever 37 is brought forward, rod 35 Twill be turned through an angle of 900, thus shiftingits greatest diameter from horizontal to vertical `and forcing the member 32 downward. The parts will remain in this position as long as desired, since the spring 17 does not exert ani/:turning movement on rod 35 so long as its-flat side is substantially vertical. The operation of the device has been made sulliciently apparent to one skilled in the art, in the course of the foregoing description.

I claimt- 1. In a typewriting machine, the combination with a platen, of front and back feed rolls operatively disposed with res )ect to said platen, a cradle having forwar ly and rearwardly )resented pairs 0f arms for supporting saidl iieed rolls, a. transversely arcuated paper apron provided with hooks engaging one pair of said arms, and a leaf spring having its endslseated on said pair of arms and its middlefpoxtion bearing against said paper apron for yieldably holdin' said cradle and apron in predetermined re ative positions.

Q.' Im a typewriting machine, the cambination with a platen and lieed rolls, of a support for saidfeed rolls, a. leafspring havin lone end bearing ainst said support and tending to press Bald feed rolls against the platen, a fixed abutment for the other end of said spring, and an adjustable seat intermediate of; the ends of said spring for tensioning the same.

' a typewriting machine, the combination #with a laten and feed rolls, ofi a support forca.'Y feed'roll-s, a leafspring having one end bearing against said support and need rolls against the platen, a fixed abutment for the other end of said spring, a seat for said lspring intermedi ate of its ends, a threaded stem for said seat, a threaded bearing for said stem, and means for rotating said stem.

4. In a typewriting machine, the combination with a platen and feed rolls of a support for said feed rolls, a leaf spring having one end bearing against said support and tending to press said feed rolls against the platen, a fixed abutment for the other end of said spring, a seat for said spring intermediate of its ends, means for increasing the friction between the seat and spring, a threaded stem for said seat, a threaded bearing for said stem, and means for rotating said stem.

5. In a typewriting machine, the combination with a platen and feed rolls, of a support for said feed rolls, a leaf spring having one end bearing against said support and tending to press said feed rolls against the platen, a fixed abutment for the other end of said spring, a hump on the under side of said spring intermediate of its ends, and an adjustable seat for said hump.

6. In a typewriting machine, the combination with a platen and feed rolls of a Support for said feed rolls, a leaf spring havin one end bearing against said support and tending to press sald feed rolls against the platen, a fixed abutment for the other end of said spring, a hump on the underside of said spring intermediate of its ends, a seat for said hump, a threaded stem for said seat, a threaded bearing for said stem, means for rotating said stem, and a hump on said seat which displaces the spring as the seat is rotated, for the purpose described.

7. In a typewriting machine, the combination with a platen, of a transversely arcuated paper apron, a plurality of spring pressed supports for pressing said apron against the platen, means for drawing the apron away from the platen, perpendicular pins on the under side of said apron, and guide-slots insaid supports, the said pins projecting into said slots respectively.

8. In a typewriter, a platen carriage provided with a longitudinal rail, arms oscilla` tably mounted on said rail, a cradle articulately connected to said arms, rolls journaled in said cradle, a paper apron provided with hooks engaging said cradle for preventing the separation of said cradle and apron, and a spring interposed between said cradle and apron and tending to separate said cradle and apron.

9. In a typewriter, a carriage provided with a channel bar extending longitudinally of said carriage, a yoke or rocker oscillatably seated in one flange of said channel bar and extending through openings in the other flange of said channel bar, a cradle articulately connected to said yoke or rocker, paper rolls journaled in said cradle, a paper apron provided with connections with said cradle for limiting the relative displacement between said cradle and apron, and a spring interposed between said apron and cradle and tending to se arate the same.

JOHN A. HAERSTROM.

Copia: at this patent muy be obtained for Ive cents each, by addressing the Commissioner o! Patents, Washington, D. 0. 

